Pdu Lab Manual 2017 Labs
Pdu Lab Manual 2017 Labs
Pdu Lab Manual 2017 Labs
Laboratory Manual
Presented to:
Submitted By:
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DISCLAIMER
This report is provided with all development notes
and source code. Code and schematic is free licensed
and Open sourced by Syed Fasih-ul-Hassan on 28 December, 2017.
This manual can be developed for personal use or
Educational purpose but it is strictly prohibited to
Develop this kit on large scale for sale purpose or any
Inappropriate use. For any kind of help regarding this
Manual please free to ask at syedfasih68@gmail.com .
Thanks
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Contents
load curve……………………………………………………………………..45
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Lab-01
Introduction to Simulink
Objective
The objective of this lab is to introduce students to the Simulink environment and
enable them to perform basic operations related to Simulink.
Introduction
Starting Up of Simulink
In order to use Simulink, you must first start MATLAB. With MATLAB running,
there are two ways to start Simulink:
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Next, select New Model from the File pull-down menu in the Library Browser.
The following blank window appears on your screen. We will refer to this window
as the model window.
Task-1
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Procedure
The following are the steps to draw the desire model on the simulink:
1. In search bar ,search the desired equipment that we required and drag it into the
model as shown in figure below:
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2. Use the previous method and draw the model by using simulink tools as we
draw the following model as shown:
3a. Now we have to change RLC into RL and also edit their values and units
by clicking right click and edit them and we rotate them by Ctrl+R as
mention below in figure:
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3c. Now click on RL series branch to set values of Resistor and Inductor.
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Figure 1
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6. Before we run the simulation we have to set the simulation time e.g.
F=50 Hz
T=1/50=20ms=0.02
If we have to run simulation for 5 seconds
0.02 * 5 = 0.1sec
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7. Now double click on the Scope to see the output waveform of the model and if
we want your desire color click on setting, see the following figure given below :
8. Select the desired color for output waveform and change the Figure color, Axes
color and Line color respectively as shown:
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9.Now “Run” the simulation, clicking on the icon as shown into the figure
below:
10. Double click on Scope to see the output waveforms of the model.
Figure 2
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Task-2
In previous task we simulate the model for single phase but now we just replaced
single source with the Three phase source
Procedure
To draw the model for three phase we have to follow the following steps:
1- Select New Model from the File pull-down menu in the Library Browser.
2-In search bar , search the Three phase Source and drag or add it to the model,
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3-In search bar , search the Measurements and select the Three Phase V-I
measurement and drag or add it to the model,
4- Use the previous method and draw the model by using simulink tools as we
draw the following model as shown:
5- Double click on the Three phase source and edit the phase to phase voltages and
frequency
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6- Now we have to change RLC into RL and also edit their values and units by
clicking right click and edit them
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7-Now Run the simulation and double click on the scope to see the output
waveform result respectively i.e:
Figure 3
8-Three output waveforms shown into the scope ,we can’t distinct between them
for this purpose we use Demux,Demux is multitasking output showing component
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9- We can also change the output ports of Demux by double click on the demux
icon
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Figure 4
Learning Outcomes
After performing this lab, students will be able to
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Lab-02
3 phase VI measurement
Objective
Introduction
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Procedure
To begin, the simulink model for the three phase source attach to transformer and
step down voltages start with the following procedure:
2- Next, select New Model from the File pull-down menu in the Library Browser.
3- In search bar , search the powergui , and drag or add it to the model,its
necessary to simulate your model on the MATLAB, demonstration shown in figure
below:
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4-In search bar , search the Three phase Source and drag or add it to the model,
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5-. Use the previous method and draw the model by using simulink library as we
draw the following as shown:
6-Use Demux component from the Simulink library ,demux is the multitasking
output showing component
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7-We can also change the output ports or Demux by double click on the demux
icon
8- Use the previous procedure then draw and connect the model by using
Simulink library as we draw the following model as shown:
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9-Double click on the Three phase source and edit the phase to phase voltages and
frequency
10- Double click on the Three phase Transformer and edit the parameters
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11- Now we have to change RLC into RL and also edit their values and units by
clicking right click and edit them
12- Before we run the simulation we have to set the simulation time e.g.
F=50 Hz
T=1/50=20ms=0.02
If we have to run simulation for 5 seconds
0.02 * 5 = 0.1sec
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13-We have connected four Scopes two for the input phase voltage and
current and the other two for the output phase voltages and current as shown:
Results
Figure 1
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Figure 2
Figure 3
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Figure 4
Learning Outcomes
After performing this lab, students will be able to
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Lab-03
Single Line Diagram
Objective
Introduction to single line diagram(SLD) and to understand its operation on
Simulink.
Introduction
Single Line Diagram(SLD) is the first step in preparing a critical response plan,
allowing you to become thoroughly familiar with the electrical distribution system
layout and design in your facility. In the single line diagram, the system component
is usually drawn in the form of their symbols. Generator and transformer
connections, star, delta and neutral earthing are indicated by symbols drawn by the
side of the representation of these elements. It is a drawing that shows by single
lines and symbols a simplified layout of a three-phase electrical system.Single line
or one-line diagram get their name form the fact only one phase of three phase
system is shown and only one line is used to represent any number of current
carrying conductors.
Task
Procedure
To begin, the simulink model for Single Line Diagram(SLD) start with the
following steps:
1-Draw the Single Line Diagram(SLD) Model on the Simulink ,with the help of
Simulink Libraries as we done in previous lab ,the model on the Simulink is
shown in figure below:
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2-Now we have to edit the values of each respective components by double click
on them e.g if have to change the value of Three Phase Source just double click on
it as shown in figure below:
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3-Now edit the configuration and parameters of the respective Transformers i.e
T1,T2,T3&T4.
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4- Now we have to change RLC into RL and also edit their values and units by
clicking right click and edit them
5- Now we have to change Series RLC into RL and also edit their values by
clicking right click and edit them as shown in figure below:
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6-After editing the respective values the final model is show in figure below:
7-To See the Output waveform run the simulation wait for compiling and then
click on the respective scope to the waveform following are the inputs and outputs
shown on the screen when we simulate the simulation
Figure 1
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Figure 2
Figure 3
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Figure 4
Learning Outcomes
After performing this lab, students will be able to
3-How power is step up and step down during the distribution and utilization with
the help of transformers and their different configurations and parameters.
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Lab-04
Load curve and load duration curve
Objective
To understand coding in matlab and to plot the curves in matlab.
Introduction
A load duration curve (LDC) is used in electric power generation to illustrate the
relationship between generating capacity requirements and capacity utilization. A
LDC is similar to a load curve but the demand data is ordered in descending order
of magnitude, rather than chronologically.
Load curve
In a power system, a load curve or load profile is a chart illustrating the variation in
demand/electrical load over a specific time. Generation companies use this
information to plan how much power they will need to generate at any given time.
A load duration curve is similar to a load curve. The information is the same but
is presented in a different form. These curves are useful in the selection
of generator units for supplying electricity.
A load duration curve (LDC) is used in electric power generation to illustrate the
relationship between generating capacity requirements and capacity utilization.A
LDC is similar to a load curve but the demand data is ordered in descending order
of magnitude, rather than chronologically. The LDC curve shows the capacity
utilization requirements for each increment of load. The height of each slice is a
measure of capacity, and the width of each slice is a measure of the utilization rate
or capacity factor. The product of the two is a measure of electrical energy (e.g.
kilowatthours).
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Procedure
1-Startup the Matlab on your personal computer and write the following code
data=[0 4 5;
4 8 15;
8 18 20;
18 24 5];
p=data(:,3);
Dt=data(:,2)-data(:,1);
total_energy=p'*Dt
L=length(data);
tt=[data(:,1) data(:,2)];
t=sort(reshape(tt,1,2*L));
for n = 1:L
pp(2*n-1)=p(n);
pp(2*n) = p(n);
end
plot(t,pp)
xlim([0 24])
ylim([0 25])
title('Load Flow')
xlabel('Time (Hr)')
ylabel('Power (MW)')
average_energy=(total_energy/24)
load_factor=(average_energy/(20*24))
%assumeing that the power factor of this particular area is 0.85 lagging
power_factor=0.85
%using power factor calculating the transformer rating that will supply
%power
transformer_rating=(20/power_factor)
2- In the given code first column is the starting points of the curves second column
is the end points of the curves and third column is the amplitude of the curves(
power).
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Figure 1
Load curve
4-Now we write the code for the Load duration curve, the code is shown as below
Data= [0 10 20;
10 14 15;
14 24 5];
P=data (;,3);
W=p’*Dt
L=length(data);
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For n=1:L
Dd (2*n-1) = p(n);
Dd (2*n) = p(n);
End
Plot (t,dd)
Ylim([0 25])
Figure 2
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Learning Outcomes
1-To plot the load curve and load duration curve through coding on Matlab.
2-Understand how to differentiate between load curve and load duration curve for
different time intervals.
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Lab-05
Determination of Load parameter
Objective
To understand about load parameters such as load factor, able to write their code
and plot curve in Matlab.
Introduction
Load flow study is the steady state analysis of power system network. Load flow
study determines the operating state of the system for a given loading. Load
flow studies are commonly used to optimize component or circuit loading.
Develop practical bus voltage profiles. The load factor is defined as the average
load divided by the peak load in a specified time period. It is a measure of
variability of consumption or generation; a low load factor indicates that load is
highly variable, whereas consumers or generators with steady consumption or
supply will have a high load factor.
Procedure
1-Startup the Matlab on your personal computer and write the following code
data=[0 4 5;
4 8 15;
8 18 20;
18 24 5];
p=data(:,3);
Dt=data(:,2)-data(:,1);
total_energy=p'*Dt
L=length(data);
tt=[data(:,1) data(:,2)];
t=sort(reshape(tt,1,2*L));
for n = 1:L
pp(2*n-1)=p(n);
pp(2*n) = p(n);
end
plot(t,pp)
xlim([0 24])
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ylim([0 25])
title('Load Flow')
xlabel('Time (Hr)')
ylabel('Power (MW)')
average_energy=(total_energy/24)
load_factor=(average_energy/(20*24))
%assumeing that the power factor of this particular area is 0.85 lagging
power_factor=0.85
%using power factor calculating the transformer rating that will supply
%power
transformer_rating=(20/power_factor)
2-The output values of code is resulted in editor file that is shown below
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3- The output curve of the respective code is shown in the figure below
Figure 1
Load flow
Learning outcomes
1-To plot the load flow curve with the help of code on Matlab.
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Lab-06
Three Part Tariff
Objectives
To calculate total charges by three part tariff.
Introduction
The amount of money frame by the supplier for the supply of electrical energy to
various types of consumers in known as an electricity tariff. In other words, the
tariff is the methods of charging a consumer for consuming electric power. The
tariff covers the total cost of producing and supplying electric energy plus a
reasonable cost.The total bill of the consumer has three parts, namely, fixed charge
D, semi-fixed charge Ax and running charge by.
This is known as three-part electricity tariff, and it is mainly applied to the big
consumer.
PROCEDURE
%}
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St = 1; % starting time
Et = 2; % ending time
L = 3; %load
for i=1;200
if value==100
break
else
data(st) = value
st=st+3;
value=0;
end
if value = 100;
break
else
data(et) = value;
et=et+3;
value=0;
end
if value==100
break
else
data(1) = value;
l=l+3;
value=0;
End
End
Data
Sz=size(data)
If w>100 %w=440
If w>300
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Rc=((100*10) + (20*200));
Rc= rc + ((w-300)*30)
Else
Rc=((100*10) + ((w-100)*20))
End
Else
End
3-Calculations
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4-Results
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Learning Outcomes
After performing this lab, students will be able to
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Lab-07
Booster Transformer
Objectives
To understand the principle of working of buck and boost transformers.
Introduction
Load parameter include rated power rated frequency rated voltage rated ratio.
A buck–boost transformer is a type of transformer used to make adjustments to
the voltage applied to alternating current equipment. Buck–boost connections are
used in several places such as uninterruptible power supply (UPS) units for
computers and in the industry.Buck–boost transformers can be used to power low
voltage circuits including control, lighting circuits, or applications that require 12,
16, 24, 32 or 48 volts, consistent with the design's secondary's. The transformer is
connected as an isolating transformer and the nameplate KVA rating is the
transformer’s capacity.Buck–Boost is a two-winding, single-phase transformer
with low voltage secondary windings, which can be connected as an
autotransformer. Used to raise or lower single and three phase line voltages by 10 –
20%.
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3-Then Set the following Parameters for Multi-Winding Transformers which can
be accessed through sources
4-Run the simulation and notice the difference in peak voltages of each phase
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2400V-2280V=120V
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3-Then Set the following Parameters for Multi-Winding Transformers which can
be accessed through sources
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4-Run the simulation and notice the difference in peak voltages of each phase
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2400V+120V=2520V
Learning Outcomes
After performing this lab we are able to understand the following:
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Lab-08
DISTRIBUTION TRANSFORMER CONNECTIONS
Objective
1-To understand the connections of distribution transformers.
2-To learn about the voltage and current distributions in various windings.
Procedure
FOR 3 PHASE, 3 WIRE, OPEN DELTA PRIMARY
1-First of all startup the Matlab on your personal computer, the editor window will
be opened. Then click Simulink Library Browser and open new model.
2-To set the parameters search “MULTI WINDING TRANFORMER” and add 2
times to the main block.
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5-Add “THREE PHASE V-I MEASUREMENT” and “SCOPE” in the main block.
The number of inputs of “SCOPE” is 3.
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Result
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5-Also add “3 phase V-I Measurement” and “Scope” in the main block. The
number of inputs are 3.
6-Search “Demux” and add it to the main block. The number of outputs are 3.
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Results
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5-Also add “THREE PHASE V-I MEASUREMENT” and “SCOPE” in the main
block. The number of inputs of “SCOPE” is 3.
7-At the end, Click on “Scope” and the following figure will be shown
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Results
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5-Also add “THREE PHASE V-I MEASUREMENT” and “SCOPE” in the main
block. The number of inputs of “SCOPE” is 3.
6-Search “Demux” and add it to the main block. The number of outputs are 3.
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7-At the end, click on “Scope” you will get the final figure as given below
Results
Learning outcomes
After performing this lab we are able to understand the following:
2-To understand the line to line and phase to phase voltage distribution.
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Lab-09
DC Distribution System
Objectives
To understand and calculate the current and voltages of the branch and load ends
respectively of DC Distribution System.
Introduction
There are three configurations of DC Distribution System:-
1-DC Distributor Fed at One End.
2-DC Distributor Fed at Both Ends.
3-DC Ring Distributor.
DC Distributor Fed At One End
In this type of feeding, the distributor is connected to the supply at one end and
loads are taken at different point along the length of the distributor. Fig. shows the
single line diagram of a DC distributor A B fed at the end A (also known as singly
fed distributor) and loads I1 , I2 and I3 tapped off at points C, D and E
respectively.
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(a) The current in the various sections of the distributor away from feeding point
goes on decreasing. Thus current in section AC is more than the current in section
CD and current in section CD is more than the current in section DE.
(b) The voltage across the loads away from the feeding point goes on decreasing.
Thus in Fig. the minimum voltage occurs at the load point E.
(c) In case a fault occurs on any section of the distributor, the whole distributor
will have to be disconnected from the supply mains. Therefore, continuity of
supply is interrupted.
Here, the load voltage goes on decreasing as we move away from one feeding
point say A , reaches minimum value and then again starts rising and reaches
maximum value when we reach the other feeding point B. The minimum voltage
occurs at some load point and is never fixed. It is shifted with the variation of load
on different sections of the distributor.
Advantages
(a) If a fault occurs on any feeding point of the distributor, the continuity of supply
is maintained from the other feeding point.
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(b) In case of fault on any section of the distributor, the continuity of supply is
maintained from the other feeding point.
(c) The area of X-section required for a doubly fed distributor is much less than
that of a singly fed distributor.
Ring Distributors
In this type, the distributor is in the form of a closed ring as shown in Fig.It is
equivalent to a straight distributor fed at both ends with equal voltages, the two
ends being brought together to form a closed ring. The distributor ring may be fed
at one or more than one point.
PROCEDURE
1- DC Distributor Fed At one end
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2. You'll to to measure the power. For this you'll need to multiply the I 2 by R.
You take the square by calling the square function which is shown below
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6. Now sum the readings using the sum block in simulink library
7. Now adjust its parameters by adding "+" signs the number of times you want
to use it.
8. Now display the readings using the display block in simulink library
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9. Now Run the simulation and you'll get the readings in the display block
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2. You'll to to measure the power. For this you'll need to multiply the I 2 by R.
You take the square by calling the square function which is shown below
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6. Now sum the readings using the sum block in simulink library
7. Now adjust its parameters by adding "+" signs the number of times you want
to use it.
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8. Now display the readings using the display block in simulink library
9. Now Run the simulation and you'll get the readings in the display block
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2. You'll to to measure the power. For this you'll need to multiply the I 2 by R.
You take the square by calling the square function which is shown below:-
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6. Now sum the readings using the sum block in simulink library:-
7. Now adjust its parameters by adding "+" signs the number of times you want
to use it.
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8. Now display the readings using the display block in simulink library:-
9. Now Run the simulation and you'll get the readings in the display block:-
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Learning Outcomes
After performing this lab, students will be able to
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Lab-10
AC Distribution System
Objectives
To understand and calculate the current and voltages of the branch and load ends
respectively of AC Distribution System.
Introduction
There are three configurations of AC Distribution System:-
1-AC Distributor Fed at One End.
2-AC Distributor Fed at Both Ends.
3-AC Ring Distributor.
AC Distributor Fed At One End
In this type of feeding, the distributor is connected to the supply at one end and
loads are taken at different point along the length of the distributor. Fig. shows the
single line diagram of a AC distributor A B fed at the end A (also known as singly
fed distributor) and loads I1 , I2 and I3 tapped off at points C, D and E
respectively.
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(a) The current in the various sections of the distributor away from feeding point
goes on decreasing. Thus current in section AC is more than the current in section
CD and current in section CD is more than the current in section DE.
(b) The voltage across the loads away from the feeding point goes on decreasing.
Thus in Fig. the minimum voltage occurs at the load point E.
(c) In case a fault occurs on any section of the distributor, the whole distributor
will have to be disconnected from the supply mains. Therefore, continuity of
supply is interrupted.
Here, the load voltage goes on decreasing as we move away from one feeding
point say A , reaches minimum value and then again starts rising and reaches
maximum value when we reach the other feeding point B. The minimum voltage
occurs at some load point and is never fixed. It is shifted with the variation of load
on different sections of the distributor.
Advantages
(a) If a fault occurs on any feeding point of the distributor, the continuity of supply
is maintained from the other feeding point.
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(b) In case of fault on any section of the distributor, the continuity of supply is
maintained from the other feeding point.
(c) The area of X-section required for a doubly fed distributor is much less than
that of a singly fed distributor.
Ring Distributors
In this type, the distributor is in the form of a closed ring as shown in Fig.It is
equivalent to a straight distributor fed at both ends with equal voltages, the two
ends being brought together to form a closed ring. The distributor ring may be fed
at one or more than one point.
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Results
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Figure 1
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Figure 2
Learning Outcomes
After performing this lab we are able to:
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Lab -11
AC DISTRIBUTION SYSTEM
Objectives
1-Design of ac distribution connections with Simulink.
3-To measure and observe voltage and RMS value of the ac distribution connected
in different configurations.
Introduction
A.C. distribution calculations differ from those of D.C distribution in the following
manner:
1-In case of D.C system, the voltage drop is due to resistance alone. However, in
A.C system, the voltage drops are due to the combined effects of resistance,
inductance and capacitance.
2-In a D.C system, additions and subtractions of currents or voltages are done
arithmetically but in case of a.c. system, these operations are done vectorically.
3-In an a.c. system, power factor (p.f.) has to be taken into account. Loads tapped
off form the distributor are generally at different power factors. There are two
ways of referring power factor:
There are several ways of solving a.c. distribution problems. However, symbolic
notation method has been found to be most convenient for this purpose. In this
method, voltages, currents and impedances are expressed in complex notation and
the calculations are made exactly as in d.c. distribution.
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How To Solve
(i) Power factors referred to receiving end voltage.
Consider an a.c. distributor AB with concentrated loads of I1 and I2 tapped off
at points C and B as shown in Fig. 14.1. Taking the receiving end voltage VB
as the reference vector, let lagging power factors at C and B be cos φ1 and cos
φ2 w.r.t. VB. Let R1, X1 and R2, X2 be the resistance and reactance of
sections AC and CB of the distributor.
Suppose the power factors of loads in the previous Fig. 14.1 are referred to
their respective load voltages. Then φ1 is the phase angle between VC and I1
and φ2 is the phase angle between VB and I2.
Task-01
Make the Ac distribution circuit fed at one end on MATLAB Simulink and
measure RMS value and voltages at the output.
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Procedure
1-First of all we attach the “AC VOLTAGE SOURCE” from the “powerlib”, place
it into our model.
2-For the line and the load resistance and inductance, we select “Series RLC
Branch” from the “powerlib” and place it into our model.
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4-We then attach the suitable VOLTAGE and CURRENT Measurements in order
the calculate the RMS voltages and RMS currents at each load.
5-Then we attach display for show the value of rms voltage and rms current.
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RESULTS
Figure 1
Figure 2
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Figure 3
Figure 4
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Figure 5
Figure 6
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Figure 7
Figure 8
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Task-02
Make the Ac distribution circuit fed at both end on MATLAB Simulink and
measure rms value and voltages at the output.
Task-03
Make the Ac distribution circuit of ring distributor on MATLAB Simulink and
measure rms value and voltages at the output.
Learning outcomes
After performing this lab we are able:
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Lab-12
Power Factor Improvement
Objective
1-To know about the power factor.
3-To draw three phase system (3 phase series RLC load) using MATLAB.
4- To calculate the power factor before and after attached the 03 phase Load.
Introduction
We know that most of the industries and power system loads are inductive that
take lagging current which decrease the system power factor. For Power factor
improvement purpose, Static capacitors are connected in parallel with those
devices which work on low power factor.
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Procedure
1-Click on “New Script” to open new model for Simulink.
2-Now open the Simulink library and draw the following given diagram on
Simulink.
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b- Now change the block parameters of 3-phase series RLC Branch by double
clicking on it. We use those parameters which are given in the circuit.
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c- Now change the block parameters of 3-phase series RLC Load by double
clicking on it. We use those parameters which are given in the circuit.
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4-Now we want to improve the power factor by adding the capacitors with each
phase .Now connect the capacitors (C1, C2, C3) as shown below.
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Learning outcomes:
1-Power factor improvement importance.
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Objective
To see firsthand apparatus that we will be studying in this course and learn
about their role in operation and protection of power systems.
Project Task
Introduction
Introduction of Components
a-Circuit Breaker
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c-Power Gui
Power Gui specifies the behavior of only the SimPowerSystems blocks in your
system. It's equivalent to specifying, for instance, the sample time of an individual
Simulink block, even though your global Simulink solver (from Model
Configuration Parameters) has its own behavior.
d-Current Transformer(CT)
e-Potential Transformer(PT)
Voltage transformers (VT), also called potential transformers (PT), are a parallel
connected type of instrument transformer. They are designed to present negligible
load to the supply being measured and have an accurate voltage ratio and phase
relationship to enable accurate secondary connected metering.
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f-Display
It shows the values of all components, it tell us the value of current, voltage. If the
input to a Display block has an enumerated data .The block displays enumerated
values, not the values of underlying integers.
g-Bus Bar
Wires connected through bus bar, but Multiple physical signal lines can be
connected together directly like they would in the physical world, without the use
of a Bus Bar.
Ideal Switch
Internal resistance
The internal resistance of the switch device, in ohms (Ω). Default is 0.001.
The Internal resistance parameter cannot be set to 0.
Initial state
The initial state of the Ideal Switch block. Default is 0. The initial status of
the Ideal Switch block is taken into account in the steady-state calculation.
Snubber resistance(RS)
The snubber resistance, in ohms (Ω). Default is 1e5. Set the Snubber
resistance Rs parameter to inf to eliminate the snubber from the model.
Snubber capacitance (Cs)
The snubber capacitance in farads (F). Default is inf. Set the Snubber
capacitance Cs parameter to 0 to eliminate the snubber, or to inf to get a
resistive snubber.
Show measurement port
If selected, add a Simulink output to the block returning the ideal switch
current and voltage. Default is selected.
Constant
To create a library for constant values that you can access by name, first create
a package folder, then define the various classes to organize the constants.For
example, to implement a set of constants that are useful for making astronomical
calculations, define a Astro Constants class in a package called constants.
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Subsystem A inside
a-
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b-
System B inside
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Isolator
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Constant
VI –Measurement
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Results
It gives values of voltages on display. The display indicate the voltages for
Commercial load and for the Residential Load by taking supply of 11kv.
Figure 1
Voltage(Vabc)
Figure 2
Current(Iabc)
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If all wires or any port does not attach properly with the component than the result
not be correct or may be not shown
Learning outcomes
After performing this project we will be able
1-To understand the line to line and phase to phase voltage distribution.
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